Thanks, I see how that could be confusing and I changed it to just
only add common names which already exist
Functionally, on iNat, common names help people find the right taxon when they’re adding an ID, so in my opinion it’s best to focus on adding names that are commonly in use or that might become so. So I think your example of an ESA name is a good one and it’d be fine to add to iNat. I don’t think well ever have an airtight definition of what common name’s should be used on iNat, but adding an official name from a body like ESA seems good, as does adding an unofficial name like “B-52” for Periplaneta americana in Hawaii (that’s what everyone called them when I grew up there).